package com.linran.utils.utils;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Supplier;

/**
* 创建新对象
* @author lin
* @date 2020/4/15
*/
public class Builder<T> {
    private final Supplier<T> instantiator;
    private List<Consumer<T>> modifiers = new ArrayList<>();
    public Builder(Supplier<T> instantiator) {
        this.instantiator = instantiator;
    }
    public static<T> Builder<T> of(Supplier<T> instantiator){
        return new Builder<>(instantiator);
    }
    public <P1> Builder<T> with(Consumer1<T,P1> consumer,P1 p1){
        Consumer<T> c = instance -> consumer.accept(instance,p1);
        modifiers.add(c);
        return this;
    }
    public <P1,P2> Builder<T> with(Consumer2<T,P1,P2> consumer,P1 p1,P2 p2){
        Consumer<T> c = instance -> consumer.accept(instance, p1, p2);
        return this;
    }
    public <P1,P2,P3> Builder<T> with(Consumer3<T,P1,P2,P3> consumer,P1 p1,P2 p2,P3 p3){
        Consumer<T> c = instance -> consumer.accept(instance, p1, p2, p3);
        return this;
    }
    public T build(){
        T t = instantiator.get();
        modifiers.forEach(modifier->modifier.accept(t));
        modifiers.clear();
        return t;
    }
    @FunctionalInterface
    public interface Consumer1<T,P1>{
        void accept(T t, P1 p1);
    }
    @FunctionalInterface
    public interface Consumer2<T,P1,P2>{
        void accept(T t, P1 p1, P2 p2);
    }
    @FunctionalInterface
    public interface Consumer3<T,P1,P2,P3>{
        void accept(T t, P1 p1, P2 p2, P3 p3);
    }
}
